WO2014128927A1

WO2014128927A1 - Compressor wheel and device for detecting unbalance in compressor assembly

Info

Publication number: WO2014128927A1
Application number: PCT/JP2013/054562
Authority: WO
Inventors: 秉一安; 吉田　順一
Original assignee: 三菱重工業株式会社
Priority date: 2013-02-22
Filing date: 2013-02-22
Publication date: 2014-08-28
Also published as: CN104870779A; US20150361993A1; EP2960465B1; CN104870779B; US9897107B2; JP5588085B1; EP2960465A1; EP2960465A4; JPWO2014128927A1

Abstract

The objective is to provide a compressor wheel for which an unbalance in the compressor wheel can be detected more effectively and precisely. Therefore, this compressor wheel, which is provided in a compressor assembly, is characterized by being equipped with: a boss part attached to a rotary shaft; a back plate part, which is provided on the opposite side with respect to the tip end at one end of the boss part, and which extends in the direction perpendicular to the rotary shaft; and a sensor detection surface, which is provided inclined with respect to the side surface of the tip end of the boss part or the side surface of the back plate part, and can be detected with a light sensor that detects reflected light of illumination light.

Description

Unbalance detection device for compressor wheel and compressor assembly

The present invention relates to a compressor wheel provided in an electric supercharger driven by an electric motor such as a high-speed motor, and an unbalance detection device for a compressor assembly.

In order to improve the performance of an internal combustion engine, a supercharger (also referred to as “turbocharger”) that is driven by the exhaust gas of the internal combustion engine and compresses the intake air to supercharge is used. In addition, electric turbochargers that have improved acceleration responsiveness and the like by incorporating an electric motor as a driving source for the turbocharger instead of the turbine and driving the compressor on the same axis as the turbocharger have become widespread. Yes. The rotating shaft of the electric supercharger is provided with a rotor made of a permanent magnet or an iron core.

In the entire assembly formed by assembling the constituent members, the rotating body such as the compressor wheel of the electric supercharger is accurately adjusted even if the rotational balance of each constituent member constituting the rotating body is accurately adjusted. There is a risk that the rotational balance may be lost due to assembly errors or the like. If the rotating body in such a state where the rotational balance is lost is rotated at a high speed, vibration may occur or the rotating body may be damaged. For this reason, before the electric supercharger is shipped, the rotating body is rotated and then a non-contact and high-accuracy balance measurement is performed, and the rotating body is unbalanced based on the measurement result. The unbalanced rotating body is corrected by cutting the required part. As a conventional technique for measuring the position and amount of the unbalance of the rotating body in a non-contact manner at the time of correcting the balance of the rotating body, Patent Document 1 attaches a magnetized nut that has been previously magnetized to a part of the rotating body, A method for measuring the unbalance by detecting the reference orientation with the magnetized nut is disclosed.

JP 2008-58008 A

When correcting the balance of a conventional turbo or assist turbo cartridge assembly, the balance deviation direction was grasped by providing a mark on the turbine side for detecting the reference orientation. However, since the electric compressor does not have a turbine, it is necessary to provide the mark on the compressor wheel. A reference azimuth detection mark for correcting the balance of a single compressor wheel is generally provided on the back side of the compressor, so that it is difficult to apply to the balance correction of the cartridge type assembly.

In the balance correction method disclosed in Patent Document 1 described above, the position and amount of the unbalance of the compressor wheel can be detected in a non-contact manner. However, since the magnetized nut to be detected is expensive, it is removed after the balance correction, and then again. There is a problem of increasing the number of processes. If the magnetized nut is not frequently calibrated, the unbalanced portion of the magnetized nut itself is removed after the magnetized nut is removed, resulting in an unbalanced assembly.

The present invention has been made in view of the above problems, and a new and improved compressor wheel and compressor assembly imbalance detection device capable of more accurately detecting compressor wheel imbalance more efficiently. The purpose is to provide.

One aspect of the present invention is a compressor wheel provided in a compressor assembly, which is provided on a side opposite to a boss portion attached to a rotating shaft and a tip portion on one end side of the boss portion, A back plate portion that extends in a vertical direction, and is provided to be inclined with respect to a side surface of the tip portion of the boss portion or a side surface of the back plate portion, and can be detected by an optical sensor that detects reflected light with respect to irradiation light. And a sensor detection surface.

According to one aspect of the present invention, the sensor detection surface is provided so as to be inclined with respect to either the boss portion or the side surface of the back plate portion, so that the reflected light is reflected only when the sensor detection surface passes in front of the optical sensor. Since it detects, the reference azimuth | direction of a compressor wheel can be detected accurately.

At this time, in one aspect of the present invention, the tip end portion of the boss portion is provided with a balance cut portion that cuts a part of the side surface, and the sensor detection surface is from an area where the balance cut portion is provided. It is good also as being provided in the said back-plate part side and provided in the said front-end | tip part side from the back surface of the said back-plate part.

In this way, since the sensor detection surface is not cut by the balance correction of the compressor wheel alone, the reference orientation can be detected accurately without being affected by the balance cut amount.

Moreover, in one aspect of the present invention, the sensor detection surface may be a bottom surface of a hole portion formed in an inclined direction with respect to the side surface on the side surface of the boss portion.

Thus, by making the hole portion obliquely with respect to the side surface of the boss portion, it is possible to detect the reflected light only when passing in front of the optical sensor and to accurately detect the reference orientation.

In one embodiment of the present invention, the distal end portion is provided on a first distal end portion where the balance cut portion is provided and a proximal end side of the first distal end portion, and has an outer diameter larger than the first distal end portion. A second tip portion, and the sensor detection surface may be a slope of a notch portion formed in an inclination direction with respect to the side surface on the top side of the side surface of the second tip surface.

In this way, the sensor detection surface can be processed more easily by providing a step portion that divides the tip portion into the first tip portion and the second tip portion.

Further, in one aspect of the present invention, the sensor detection surface may be a slope of a notch formed on the top side of the side surface of the back plate portion in an inclined direction with respect to the side surface.

In this way, by providing the slope of the notch on the top side of the side surface of the back plate and making the slope a sensor detection surface, reflected light is detected only when the sensor detection surface passes in front of the optical sensor. It is possible to accurately detect the reference direction of the compressor wheel.

In one embodiment of the present invention, the side surface of the back plate portion is provided with a balance cut portion that cuts a part of the side surface in the vertical direction, and the sensor detection surface is the side surface of the back plate portion. Among them, it is good also as being the slope of the notch part formed in the inclination direction to the side surface on the top side of the side surface excluding the portion where the balance cut portion is provided.

In this way, by providing the slope of the notch on the top side of the side surface of the back plate and making the slope a sensor detection surface, reflected light is detected only when the sensor detection surface passes in front of the optical sensor. It is possible to accurately detect the reference direction of the compressor wheel. Further, the sensor detection surface is not cut by correcting the balance of the compressor wheel alone.

Moreover, in one aspect of the present invention, the sensor detection surface may be a slope of a notch formed on the side surface of the boss portion in an inclined direction with respect to the side surface.

In this way, by providing the slope of the notch on the side surface of the boss and making the slope a sensor detection surface, the reflected light is detected only when the sensor detection surface passes in front of the optical sensor. The reference azimuth of the wheel can be detected with high accuracy.

In one aspect of the present invention, the tip end portion of the boss portion is provided with a balance cut portion in which a part of the side surface is cut in the vertical direction, and the sensor detection surface is provided with the balance cut portion. The bottom surface of the hole is provided in a region formed in an inclined direction with respect to the cut surface of the balance cut portion, and the bottom surface is closer to the rotation axis than the maximum cut range of the balance cut portion. It is good.

In this way, the length of the tip of the boss can be suppressed, so that the compressor wheel can be made compact. In addition, since the sensor detection surface is not cut by the balance correction of the compressor wheel alone, the reference orientation can be detected accurately without being affected by the balance cut amount.

According to another aspect of the present invention, there is provided an unbalance detection device for a compressor assembly provided with any of the above-described compressor wheels, the rotating unit for rotating the compressor wheel, and sensor detection provided in the compressor wheel. And a detection unit provided with an optical sensor for detecting the surface.

According to another aspect of the present invention, by applying the above-described compressor wheel, it is possible to detect the reference azimuth of the compressor wheel with high accuracy during balance measurement.

At this time, in another aspect of the present invention, the rotating unit may be an air supply device that supplies air toward the compressor blades of the compressor wheel.

In this way, since the balance can be easily corrected with the motor and inverter of the compressor assembly removed, the unbalance detection device can be simplified and miniaturized.

In another aspect of the present invention, the air supply device may supply the air from the downstream side to the upstream side of the compressor wheel.

This makes it possible to efficiently rotate the compressor wheel when detecting an imbalance of the compressor assembly.

In another aspect of the present invention, the air supply device may supply the air from the upstream side to the downstream side of the compressor wheel.

In this way, it is possible to measure the balance of the compressor wheel with high accuracy.

In another aspect of the present invention, the rotating unit may be a motor that rotationally drives a rotating shaft provided in the compressor assembly.

In this way, the compressor wheel unbalance due to the magnetic attractive force of the motor can be corrected, so that the quality of the finished product can be further improved.

In another aspect of the present invention, a portion of the compressor assembly that faces the end opposite to the end on which the compressor wheel is provided may be an opening.

This makes it possible to correct the balance by cutting nuts from the rear end side of the compressor assembly.

As described above, according to the present invention, it is possible to more efficiently detect compressor wheel imbalance.

(A) is a top view of the compressor wheel in the 1st Embodiment of this invention, (b) is an arrow view from the A direction of Fig.1 (a), (c) is FIG. It is BB sectional drawing of (a). (A), (b) is a figure explaining the operation | movement which detects the sensor detection surface of the compressor wheel of the embodiment with an optical sensor. (A), (b) is a figure explaining the structure of the sensor detection surface of the compressor wheel in the 2nd Embodiment of this invention, and the operation | movement which detects the said sensor detection surface with an optical sensor. (A), (b) is a figure explaining the structure of the sensor detection surface of the compressor wheel in the 3rd Embodiment of this invention, and the operation | movement which detects the said sensor detection surface with an optical sensor. (A), (b) is a figure explaining the formation site | part of the sensor detection surface of the compressor wheel in the 3rd Embodiment of this invention. (A), (b) is a figure explaining the structure of the sensor detection surface of the compressor wheel in the 4th Embodiment of this invention, and the operation | movement which detects the said sensor detection surface with an optical sensor. (A), (b) is a figure explaining the structure of the sensor detection surface of the compressor wheel in the 5th Embodiment of this invention, and the operation | movement which detects the said sensor detection surface with an optical sensor. It is a schematic block diagram of the compressor assembly in which the compressor wheel of each embodiment of this invention is provided. It is a schematic block diagram of one Embodiment of the unbalance detection apparatus of the compressor assembly provided with the compressor wheel of each embodiment of this invention. It is a flowchart explaining the operation | movement of balance correction using the unbalance detection apparatus of the compressor assembly of the embodiment. It is a schematic block diagram of other embodiment of the unbalance detection apparatus of the compressor assembly provided with the compressor wheel of each embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.

(First embodiment)
First, a first embodiment of a compressor wheel of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a compressor wheel in the first embodiment of the present invention, (a) is a plan view of the compressor wheel in the present embodiment, and (b) is a direction A of FIG. 1 (a). (C) is a cross-sectional view taken along the line BB of FIG. 1 (a). FIGS. 2A and 2B are diagrams for explaining the operation of detecting the sensor detection surface of the compressor wheel of the embodiment with an optical sensor.

The compressor wheel 100 of the present embodiment is formed from a weight-reduced alloy such as aluminum, magnesium, or titanium by a processing method such as casting, forging, or machining. As shown in FIGS. 1A to 1C, the compressor wheel 100 includes a disc-shaped back plate portion 102, a boss portion 104 provided integrally integrally with the back plate portion 102, and a boss portion 104.

Compressor blades

106 and 108 that are integrally provided over the back plate 102 and a sensor detection unit 110 are provided. In the present embodiment, the tip 104a of the boss 104 is provided with a balance cut portion 105 that cuts a part of the side surface 104b when the balance of the compressor wheel alone is corrected. The back plate portion 102 is provided on the opposite side to the tip portion 104a on one end side of the boss portion 104, and spreads in the vertical direction with respect to the rotating shaft 52 (see FIG. 8) attached to the boss portion 104. However, the vertical direction includes an error range of about ± 5 °.

As shown in FIG. 1A, the compressor blades have six long blades 106 and six short blades 108 arranged alternately. Further, as shown in FIGS. 1A and 1C, the boss portion 104 and the back plate portion 102 are provided with circular through holes 103. Further, as shown in FIG. 1B, a thick portion 109 is formed on the base portion of the back plate portion 102 with the boss portion 104 on the back surface side where stress concentrates. . Note that the number of the

compressor blades

106 and 108 is not limited to the above number, and may be configured such that there is no build-up on the back side of the back plate portion 102.

This embodiment is characterized in that a sensor detection surface 110 that can be detected by an optical sensor that detects reflected light with respect to irradiation light is provided to be inclined with respect to the side surface 104b of the tip portion 104a of the boss portion 104. That is, as shown in FIG. 2A, the bottom surface 110b of the hole 110a formed on the side surface 104b of the boss 104 in an inclined direction with respect to the side surface 104b becomes the sensor detection surface 110. In other words, in the present embodiment, the sensor detection surface 110 is provided to be inclined with respect to the vertical direction of the side surface 104b.

Further, in the present embodiment, the sensor detection surface 110 is provided in the region A2 on the back plate side from the region A1 in which the balance cut part 105 is provided. That is, a hole 110a serving as a sensor detection surface 110 for detecting an optical sensor is provided between the balance cut region 105 of the tip 104a of the boss 104 serving as a nut fastening portion of the compressor wheel 100 and the

compressor blades

106 and 108.

The sensor detection surface 110 is preferably as small as possible from the viewpoint of the strength of the compressor wheel 100. For this reason, the width of the sensor detection surface 110 is set to such a width that the sensor detection surface 110 can be detected by the optical sensor 30, for example, about 0.5 mm to about 1.5 mm, preferably about 1 mm. In addition, the inclination angle of the sensor detection surface 110 can be detected by the optical sensor 30 by identifying the sensor detection surface 110 from the side surface 104b of the tip end portion 104a of the boss portion 104 and the balance cut portion 105 that becomes an excavation processing surface by balance correction. Any angle of inclination may be used. For example, it is about 30 ° to about 60 °, preferably about 45 °.

The sensor detection surface 110 is detected by the reflected light L2 with respect to the irradiation light L1 from the optical sensor 30. As the optical sensor 30, a fiber sensor or the like that performs light emission and incidence coaxially is used. As shown in FIG. 2A, the optical sensor 30 is arranged in a state inclined by about 45 ° with respect to the axial direction of the boss portion 104. That is, the optical sensor 30 is substantially orthogonal to the sensor detection surface 110, that is, the bottom surface 110b of the hole 110a, and is inclined by about 45 ° with respect to the side surface 102a and the back surface 102b of the back plate portion 102 of the compressor wheel 100. ing.

As a result, the irradiation light L1 from the optical sensor 30 is regularly reflected with respect to the sensor detection surface 110, and the reflected light L2 enters the optical sensor 30. That is, the sensor detection surface 110 is detected by the reflected light L2 of the irradiation light L1 from the optical sensor 30. On the other hand, when the irradiation light L1 is irradiated to a portion where the sensor detection surface 110 is not provided, that is, to other portions of the side surface 104b of the boss 104, as shown in FIG. Thus, the light is reflected at about 45 ° and does not enter the optical sensor 30.

As described above, in this embodiment, the hole 110a is opened in an oblique direction with respect to the side surface 104b of the boss 104, so that the reflected light L2 is passed only in front of the optical sensor 30 during the balance correction unbalance inspection. To detect. Therefore, when the balance of the compressor assembly 50 (see FIG. 8) provided with the compressor wheel 100 is corrected, the sensor detection surface 110 serving as a reference direction for measuring the unbalanced position and amount of the compressor wheel 100 in a non-contact manner is accurate. Can be detected well.

(Second Embodiment)
Next, a second embodiment of the compressor wheel of the present invention will be described with reference to the drawings. FIGS. 3A and 3B are diagrams illustrating the configuration of the sensor detection surface of the compressor wheel and the operation of detecting the sensor detection surface with an optical sensor in the second embodiment of the present invention.

In the present embodiment, as shown in FIG. 3A, the tip end of the boss portion 204 is provided on the first tip end portion 204a where the balance cut portion 205 is provided, and on the base end side of the first tip end portion 204a. A second tip portion 206 having an outer diameter larger than that of the first tip portion 204a. As shown in FIGS. 3A and 3B, the slope 210b of the notch 210a formed on the top side of the side face 206a of the second tip portion 206 in an inclined direction with respect to the side face 206a is a sensor detection surface. 210. That is, in the present embodiment, the sensor detection surface 210 is provided to be inclined with respect to the vertical direction of the side surface 206a of the second tip end portion 206. In addition, since it is the same as that of 1st Embodiment regarding the other component of the compressor wheel 200 of this embodiment, the description is abbreviate | omitted.

Further, in this embodiment, as in the first embodiment, the sensor detection surface 210 is provided in the region A2 on the back plate portion side from the region A1 in which the balance cut portion 205 is provided. That is, a sensor detection surface 210 for detecting an optical sensor is formed between the balance cut region 205 of the first tip portion 204a of the boss portion 204 serving as a nut fastening portion of the compressor wheel 200 and the compressor blades 106 and 108 (see FIG. 1). A slope 210b is provided.

The sensor detection surface 210 is preferably as small as possible from the viewpoint of the strength of the compressor wheel 200. For this purpose, the width of the sensor detection surface 210 is set to such a width that the sensor detection surface 210 can be detected by the optical sensor 30, for example, about 0.5 mm to about 1.5 mm, preferably about 1 mm. Further, the inclination angle of the sensor detection surface 210 is determined by the optical sensor 30 with respect to the sensor detection surface 210 and the side surface 204b of the first tip portion 204a of the boss portion 204, the side surface 206a of the second tip portion 206, and the excavation processing surface by balance correction. Any tilt angle that can be distinguished from the balance cut unit 205 and detected can be used. For example, it is about 30 ° to about 60 °, preferably about 45 °.

The sensor detection surface 210 is detected by the reflected light L2 with respect to the irradiation light L1 from the optical sensor 30. As the optical sensor 30, a fiber sensor or the like that performs light emission and incidence coaxially is used. As shown in FIG. 3A, the optical sensor 30 is arranged in a state inclined by about 45 ° with respect to the axial direction of the boss portion 204. That is, the optical sensor 30 is substantially orthogonal to the sensor detection surface 210, that is, the inclined surface 210b of the notch portion 210a, and is inclined by about 45 ° with respect to the side surface and the back surface of the back plate portion 202 of the compressor wheel 200. .

As a result, the irradiation light L1 from the optical sensor 30 is regularly reflected by the sensor detection surface 210, and the reflected light L2 enters the optical sensor 30. That is, the sensor detection surface 210 is detected by the reflected light L2 of the irradiation light L1 from the optical sensor 30. On the other hand, when the irradiation light L1 irradiates a portion where the sensor detection surface 210 is not provided, that is, another portion of the second tip portion 206 of the boss portion 204, the reflection is reflected at about 45 ° with respect to the other portion. Thus, it does not enter the optical sensor 30.

As described above, in the present embodiment, the notch portion 210a is formed in an oblique direction with respect to the side surface 206a of the second boss portion 206, thereby reflecting only when passing in front of the optical sensor 30 during an imbalance inspection for balance correction. The light L2 is detected. Therefore, when the balance of the compressor assembly 50 (see FIG. 8) provided with the compressor wheel 200 is corrected, the sensor detection surface 210 serving as a reference direction for measuring the unbalanced position and amount of the compressor wheel 200 in a non-contact manner is accurately measured. Can be detected well. Further, in the present embodiment, the sensor detection surface 210 can be processed more easily by providing a step portion by dividing the tip portion of the boss portion 204 into the first tip portion 204a and the second tip portion 206.

(Third embodiment)
Next, a third embodiment of the compressor wheel of the present invention will be described with reference to the drawings. FIGS. 4A and 4B are diagrams illustrating the configuration of the sensor detection surface of the compressor wheel and the operation of detecting the sensor detection surface with an optical sensor in the third embodiment of the present invention. FIGS. 5A and 5B are views for explaining the formation site of the sensor detection surface of the compressor wheel in the third embodiment of the present invention.

In the present embodiment, as shown in FIGS. 4A and 4B, the sensor detection surface 310 is provided on the upper surface on the downstream side of the compressor wheel 300, that is, on the side surface 302a of the back plate 302. . Specifically, as shown in FIGS. 5A and 5B, the balance cut portion 305 formed on the side surface 302 a of the back plate portion 302 in the portion Z where the

compressor blades

306 and 308 of the compressor wheel 300 are absent. A cutout portion 310a is formed in the inclined direction with respect to the side surface 302a on the top side of the side surface 302a of the portion Y excluding the portion X where the sensor portion X is provided, and the inclined surface 310b of the cutout portion 310a becomes the sensor detection surface 310. That is, in the present embodiment, the sensor detection surface 310 is provided to be inclined with respect to the vertical direction of the side surface 302a of the back plate portion 302. In addition, since it is the same as that of 1st Embodiment regarding the other component of the compressor wheel 300 of this embodiment, the description is abbreviate | omitted.

The sensor detection surface 310 is preferably as small as possible because of the strength of the compressor wheel 300. Therefore, the width of the sensor detection surface 310 is set to such a width that the sensor detection surface 310 can be detected by the optical sensor 30, for example, about 0.5 mm to about 1.5 mm, preferably about 1 mm. In addition, the inclination angle of the sensor detection surface 310 may be an inclination angle that allows the optical sensor 30 to distinguish and detect the sensor detection surface 310 from the side surface 302 of the back plate 302. For example, it is about 30 ° to about 60 °, preferably about 45 °.

The sensor detection surface 310 is detected by the reflected light L2 with respect to the irradiation light L1 from the optical sensor 30. As shown in FIG. 4B, the optical sensor 30 is disposed in a state inclined by about 45 ° with respect to the vertical direction of the side surface 302 of the back plate portion 302. That is, the optical sensor 30 is substantially orthogonal to the sensor detection surface 310, that is, the inclined surface 310b of the notch 310a, and is inclined by about 45 ° with respect to the side surface 302a and the back surface 302b of the back plate portion 302 of the compressor wheel 300. ing.

As a result, the irradiation light L1 from the optical sensor 30 is regularly reflected by the sensor detection surface 310, and the reflected light L2 enters the optical sensor 30. That is, the sensor detection surface 310 is detected by the reflected light L2 of the irradiation light L1 from the optical sensor 30. On the other hand, when the irradiation light L1 irradiates a portion where the sensor detection surface 310 is not provided, that is, another portion of the side surface 302 of the back plate 302, the light is reflected at about 45 ° with respect to the other portion. It does not enter the optical sensor 30.

As described above, in the present embodiment, by forming the notch portion 310a obliquely with respect to the side surface 302a of the back plate portion 302, the reflected light is passed only when passing in front of the optical sensor 30 during the balance correction unbalance inspection. L2 is detected. Therefore, when the balance of the compressor assembly 50 (see FIG. 8) provided with the compressor wheel 300 is corrected, the sensor detection surface 310 serving as a reference direction for measuring the unbalanced position and amount of the compressor wheel 300 in a non-contact manner is accurately measured. Can be detected well. In the present embodiment, the notch 310a is formed in the side surface 302a of the back plate 302 that is vacant between the

arbitrary compressor blades

306 and 308, and the inclined surface 310b is used as the sensor detection surface 310. 310 can be easily processed.

(Fourth embodiment)
Next, a fourth embodiment of the compressor wheel of the present invention will be described with reference to the drawings. FIGS. 6A and 6B are diagrams illustrating the configuration of the sensor detection surface of the compressor wheel and the operation of detecting the sensor detection surface with an optical sensor in the fourth embodiment of the present invention.

In this embodiment, the sensor detection surface 410 is provided so as to be inclined in the horizontal direction with respect to the side surface 404b of the tip end portion 404a of the boss portion 404. That is, as shown in FIG. 6A, the slope 410b of the notch 410a formed on the side surface 404b of the boss portion 404 so as to be inclined in the horizontal direction with respect to the side surface 404b becomes the sensor detection surface 410. In other words, in the present embodiment, the sensor detection surface 410 is provided to be inclined with respect to the horizontal direction of the side surface 404b. In addition, since it is the same as that of 1st Embodiment regarding the other component of the compressor wheel 400 of this embodiment, the description is abbreviate | omitted.

The sensor detection surface 410 is preferably as small as possible from the viewpoint of the strength of the compressor wheel 400. For this purpose, the width of the sensor detection surface 410 is set to such a width that the sensor detection surface 410 can be detected by the optical sensor 30, for example, about 0.5 mm to about 1.5 mm, preferably about 1 mm. Further, the inclination angle of the sensor detection surface 410 can be detected by the optical sensor 30 identifying the sensor detection surface 410 from the side surface 404b of the tip end portion 404a of the boss portion 404 and the balance cut portion 405 that becomes an excavation processing surface by balance correction. Any angle of inclination may be used. For example, it is about 30 ° to about 60 °, preferably about 45 °.

The sensor detection surface 410 is detected by the reflected light L2 with respect to the irradiation light L1 from the optical sensor 30. As the optical sensor 30, a fiber sensor or the like that performs light emission and incidence coaxially is used. As shown in FIG. 6A, the optical sensor 30 is arranged in a state inclined by about 45 ° with respect to the horizontal direction of the boss portion 404. That is, the optical sensor 30 is substantially orthogonal to the sensor detection surface 410, that is, the inclined surface 410b of the notch 410a.

As a result, the irradiation light L1 from the optical sensor 30 is regularly reflected by the sensor detection surface 410, and the reflected light L2 enters the optical sensor 30. That is, the sensor detection surface 410 is detected by the reflected light L2 of the irradiation light L1 from the optical sensor 30. On the other hand, when the irradiation light L1 is irradiated on a portion where the sensor detection surface 410 is not provided, that is, on another portion of the boss 404, the light is reflected by about 45 ° with respect to the other portion and reflected on the optical sensor 30. Not incident.

As described above, in the present embodiment, when the notch portion 410a is formed in an oblique direction with respect to the side surface 404b of the tip end portion 404a of the boss portion 404, when passing in front of the optical sensor 30 during an unbalance inspection for balance correction. Only the reflected light L2 is detected. Therefore, when the balance of the compressor assembly 50 (see FIG. 8) provided with the compressor wheel 200 is corrected, the sensor detection surface 410 serving as a reference direction for measuring the unbalanced position and amount of the compressor wheel 400 in a non-contact manner is accurate. Can be detected well.

(Fifth embodiment)
Next, a fifth embodiment of the compressor wheel of the present invention will be described with reference to the drawings. FIGS. 7A and 7B are diagrams illustrating the configuration of the sensor detection surface of the compressor wheel and the operation of detecting the sensor detection surface with an optical sensor in the fifth embodiment of the present invention.

In this embodiment, the sensor detection surface 510 is provided in a region where the balance cut portion 505 of the tip portion 504a of the boss portion 504 is provided. That is, as shown in FIG. 7A, the bottom surface 510b of the hole 510a formed in the inclined direction with respect to the side surface 504b in the region where the balance cut portion 505 is provided in the side surface 504b of the boss portion 504 is a sensor. It becomes the detection surface 510. In other words, in the present embodiment, the sensor detection surface 510 is provided to be inclined with respect to the vertical direction of the side surface 504b. In addition, since it is the same as that of 1st Embodiment regarding the other component of the compressor wheel 500 of this embodiment, the description is abbreviate | omitted.

The sensor detection surface 510 is preferably as small as possible from the viewpoint of the strength of the compressor wheel 500. For this reason, the width of the sensor detection surface 510 is set to such a width that the sensor detection surface 510 can be detected by the optical sensor 30, for example, about 0.5 mm to about 1.5 mm, preferably about 1 mm. Further, the inclination angle of the sensor detection surface 510 can be detected by the optical sensor 30 distinguishing the sensor detection surface 510 from the side surface 504b of the tip end portion 504a of the boss portion 504 and the balance cut portion 505 which becomes an excavation processing surface by balance correction. Any angle of inclination may be used. For example, it is about 30 ° to about 60 °, preferably about 45 °.

The sensor detection surface 510 is detected by the reflected light L2 with respect to the irradiation light L1 from the optical sensor 30. As the optical sensor 30, a fiber sensor or the like that performs light emission and incidence coaxially is used. As shown in FIG. 7A, the optical sensor 30 is disposed in a state inclined by about 45 ° with respect to the vertical direction of the boss portion 504. That is, the optical sensor 30 is substantially orthogonal to the sensor detection surface 510, that is, the bottom surface 510b of the hole 510a.

As a result, the irradiation light L1 from the optical sensor 30 is regularly reflected by the sensor detection surface 510, and the reflected light L2 enters the optical sensor 30. That is, the sensor detection surface 510 is detected by the reflected light L2 of the irradiation light L1 from the optical sensor 30. On the other hand, when the irradiation light L1 is irradiated on a portion where the sensor detection surface 510 is not provided, that is, on another portion of the boss portion 504, the light is reflected by about 45 ° with respect to the other portion and reflected on the optical sensor 30 Not incident.

As described above, in this embodiment, when the hole 510a is formed obliquely with respect to the side surface 504b of the tip 504a of the boss 504, when passing in front of the optical sensor 30 at the time of unbalance inspection for balance correction. Only the reflected light L2 is detected. Therefore, when the balance of the compressor assembly 50 (see FIG. 8) provided with the compressor wheel 500 is corrected, the sensor detection surface 510 serving as a reference direction for measuring the unbalanced position and amount of the compressor wheel 500 in a non-contact manner is accurately measured. Can be detected well.

Further, in the present embodiment, the bottom surface 510b of the hole portion 510a is characterized in that it is closer to the rotational axis A5 side of the compressor wheel 500 than the maximum cut range of the balance cut portion 505. That is, as shown in FIG. 7A, since the depth D1 of the hole 510a for providing the sensor detection surface 510 is larger than the depth D2 of the balance cut portion 505, it overlaps with the balance cut portion 510. A sensor detection surface 510 can be provided at a site to be operated. Therefore, the length of the tip end portion 504a of the boss portion 504 can be suppressed as compared with the compressor wheel of the first to fourth embodiments, so that the compressor wheel 500 can be made compact.

As described above, the compressor wheel according to each embodiment of the present invention is provided with a sensor detection surface serving as a mark for detecting a reference orientation that does not need to be removed after correcting the balance, in a portion other than the back surface of the compressor wheel. For this reason, even after the cartridge-type compressor assembly is assembled, the sensor detection surface serving as the reference detection unit is not hidden during the imbalance inspection at the time of balance correction. Yes. In addition, since the sensor detection surface can be easily provided in advance on the compressor wheel, unbalance inspection can be performed without using a new tool such as a magnetized nut during unbalance inspection after assembly assembly. The inspection process can be shortened.

(Composition of compressor assembly)
Next, the configuration of the compressor assembly provided with the compressor wheel in each embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a schematic configuration diagram of a compressor assembly provided with a compressor wheel according to each embodiment of the present invention.

The compressor assembly 50 includes a rotary shaft 52, a rotor core 54 attached to one end of the rotary shaft 52, and the compressor wheel 100 (200, 300, 400, 500) of each of the above-described embodiments attached to the other end. ) And

bearings

56 and 58 that support the rotating shaft 52. Further, the rotary shaft 52, the rotor core 54, and the

bearings

56, 58 except for the portion to which the compressor wheel 100 (200, 300, 400, 500) is attached are built in the casing 60. Then, both ends of the rotary shaft 52 extending from both ends of the compressor assembly 50 are fastened with

nuts

62 and 64.

The rotary shaft 52 is composed of a shaft portion 52b having a thick middle portion in the axial direction and a thin shaft portion 52a to which a compressor wheel 100 (200, 300, 400, 500) provided on both ends thereof is fitted. A connecting portion between the thick shaft portion 52b and the thin shaft portion 52a is a stepped portion, and serves as an axial stopper portion when the compressor wheel 100 (200, 300, 400, 500) is attached. Further, the nuts 62 and 64 attached to both ends of the rotary shaft 52 can be used as a balance correction processing portion when performing balance adjustment after assembling the compressor assembly 50.

The type of the

bearings

56 and 58 may be either a ball bearing (angular contact ball bearing) or a metal bearing (sliding bearing), and is not particularly defined. Further, in the present embodiment, as shown in FIG. 8, the

bearings

56 and 58 are fixed on both sides of the rotor core 54 provided on the rotary shaft 52, but the rotor core 54 and the bearing 56 are configured. , 58 can be other positions.

(Compressor assembly imbalance detection device)
Next, an embodiment of a compressor assembly imbalance detection apparatus provided with a compressor wheel according to each embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a schematic configuration diagram of an embodiment of an unbalance detection apparatus for a compressor assembly provided with a compressor wheel according to each embodiment of the present invention.

The unbalance detection apparatus 10 detects the sensor detection surface provided in the compressor wheel 100 (200, 300, 400, 500) provided in the compressor assembly 50 by the

optical sensor

30a or 30b. Then, the unbalance detection device 10 measures (measures) the position and amount of unbalance of the compressor wheel 100 (200, 300, 400, 500) with reference to the sensor detection surface.

In the present embodiment, as shown in FIG. 9, the unbalance detection device 10 includes an air supply device 12, a compressor cover 14 for introducing air, a detection unit 31 provided with an

optical sensor

30 a or 30 b, and a compressor assembly 50. , An acceleration detector (not shown), a vector filter (not shown) connected to the

optical sensors

30a and 30b and the acceleration detector, and an A / D converter connected to the vector filter (Not shown) and a computer (not shown) connected to the A / D converter.

In the present embodiment, the nut 64 (see FIG. 8) or the like is also cut from the rear end side of the compressor assembly 50 so that the balance can be corrected. A portion facing the end on the opposite side is an opening 18. Thus, by providing the opening 18 on the rear end side, not only the nut 62 on the front end side of the compressor assembly 50 but also the nut 64 can be cut from the rear end side, so that the balance adjustment of the compressor assembly can be adjusted more accurately. You can do it.

The air supply device 12 functions as a rotating unit that supplies air toward the compressor blades of the compressor wheel 100 (200, 300, 400, 500) via the compressor cover 14 and rotates the compressor wheel. By rotating the compressor wheel with the air supply device 12, the balance can be easily corrected with the motor and the inverter of the compressor assembly 50 removed, so that the unbalance detection device 10 can be simplified and miniaturized.

Further, when it is necessary to quickly increase the rotational speed, the air supply device 12 is provided with the compressor wheel 100 (200, 300, 400, 500) in order to efficiently transmit the energy of the introduced air to the compressor wheel. It is preferable to supply air from the downstream side to the upstream side.

Further, when it is necessary to perform balance measurement with high accuracy, the air supply device 12 is connected to the compressor wheel 100 (200, 300, 400) in order to uniformly transmit the introduced air energy to the compressor wheel in the radial direction. 500), air is preferably supplied from the upstream side toward the downstream side.

The detection unit 31 is provided with an

optical sensor

30a or 30b for detecting a sensor detection surface provided in the compressor wheel 100 (200, 300, 400, 500). When the sensor detection surface of the compressor wheel is provided on the tip end side of the boss portion, the first optical sensor 30a provided at a position where irradiation light can be irradiated on the tip end side is used. On the other hand, when the sensor detection surface of the compressor wheel is provided on the side surface top portion side of the back plate portion, the second optical sensor 30b provided at a position where irradiation light can be irradiated on the side surface top portion side of the back plate portion is used. .

The unbalance detection device 10 having such a configuration rotates the compressor wheel 100 (200, 300, 400, 500) and irradiates light from the

optical sensor

30a or 30b. Then, detection signals from the

optical sensor

30a or 30b and the acceleration detector are input to the computer via the vector filter and the A / D converter. The computer calculates vibration characteristics, calibration, and balance, and records and processes the data. As a result, the unbalance detection device 10 calculates how much weight unbalance is present at which angle in the compressor wheel 100 (200, 300, 400, 500) with the sensor detection surface 110 as the zero reference. Measure by calculation and vector decomposition.

Next, the balance correction operation using the compressor assembly unbalance detection apparatus of the present embodiment will be described with reference to the drawings. FIG. 10 is a flowchart for explaining the balance correction operation using the compressor assembly unbalance detection apparatus of the present embodiment.

First, after the assembled compressor assembly is installed in the unbalance detection device (step S10), the compressor wheel is rotated to the target rotational speed, the unbalance vectors on both sides are measured, and the unbalance correction amount is calculated. (Step S11). In the present embodiment, the compressor wheel is rotated by the compressed air supplied from the air supply device, and the unbalanced position and amount of the compressor wheel are calculated based on the detection result from the optical sensor.

Then, based on the calculated unbalance position and amount, the nut provided at the end on the side where the compressor wheel is provided or the nut for the weight necessary to eliminate the unbalance from the nut provided on the opposite side A part of is cut off with a cutting device or the like (step S12). Then, after removing the deburring (step S13), it is confirmed whether or not the vibration of the compressor wheel when rotated is within an allowable range (step S14). If the vibration of the compressor wheel when rotated is within an allowable range, the balance correction of the compressor assembly including the compressor wheel is finished. On the other hand, if the vibration of the compressor wheel when rotated is outside the allowable range, the shaved nut is replaced (step S15), and the process returns to step S11 again.

As described above, in this embodiment, by applying the compressor wheel of each of the above-described embodiments to the compressor assembly, the reference azimuth can be accurately detected during balance measurement. Further, since the compressor wheel is rotated by the air supply device at the time of inspection, the balance can be easily corrected with the motor and inverter of the electric compressor removed, and the device can be simplified and downsized.

Next, another embodiment of an unbalance detection apparatus for a compressor assembly provided with a compressor wheel according to each embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a schematic configuration diagram of another embodiment of an unbalance detection device for a compressor assembly provided with a compressor wheel according to each embodiment of the present invention.

In the present embodiment, as shown in FIG. 11, the unbalance detection device 20 includes a detection unit 31 provided with an

optical sensor

30a or 30b, a motor 22 that rotationally drives a rotary shaft provided in the compressor assembly 50, and acceleration detection. A vector filter (not shown) connected to the

optical sensor

30a or 30b and the acceleration detector, an A / D converter (not shown) connected to the vector filter, and an A / D A computer (not shown) connected to the converter. That is, in the present embodiment, the motor 22 functions as a rotating unit that rotates the compressor wheel 100 (200, 300, 400, 500) of the compressor assembly 50.

The detection unit 31 is provided with an

optical sensor

30a or 30b for detecting a sensor detection surface provided in the compressor wheel 100 (200, 300, 400, 500), as in the embodiment. When the sensor detection surface of the compressor wheel is provided on the tip end side of the boss portion, the first optical sensor 30a provided at a position where irradiation light can be irradiated on the tip end side is used. On the other hand, when the sensor detection surface of the compressor wheel is provided on the side surface top portion side of the back plate portion, the second optical sensor 30b provided at a position where irradiation light can be irradiated on the side surface top portion side of the back plate portion is used. .

In this embodiment, as shown in FIG. 11, the compressor wheel 100 (200, 300, 400, 500) is surrounded by a compressor cover 24 including an

optical sensor

30a or 30b. It is good also as a structure which brings only an optical sensor close to a compressor wheel, without enclosing by. When it is necessary to perform balance correction in a state closer to the product, it is preferable to provide the compressor cover 24. On the other hand, when it is necessary to perform balance measurement in a shorter time, it is preferable not to include the compressor cover 24 in order to reduce the attachment process.

Other components of the unbalance detection device 20 are the same as those of the unbalance detection device 10 of the above-described embodiment, and thus description of the configuration is omitted. The outline of the balance correction operation flow using the unbalance detection apparatus is also the same as that of the above-described embodiment, and the description thereof will be omitted.

In the present embodiment, since the rotating shaft provided in the compressor assembly is driven to rotate by passing an electric current through the motor 22, the imbalance of the compressor wheel due to the magnetic attraction force of the motor can be corrected, thereby further improving the quality of the finished product. it can. In addition, by passing an electric current through the motor 22, an unbalance inspection can be performed simultaneously with discharge pressure confirmation, energization confirmation, responsiveness confirmation, and the like, so that it can also serve as an unbalance inspection and a finished product inspection.

Although each embodiment of the present invention has been described in detail as described above, it is easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. It will be possible. Therefore, all such modifications are included in the scope of the present invention.

For example, a term described together with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configurations and operations of the compressor wheel and the compressor assembly imbalance detection device are not limited to those described in the embodiments of the present invention, and various modifications can be made.

10, 20 Unbalance detection device 12 Rotating unit (air supply device)
18 Opening 22 Rotating part (motor)
30 Optical sensor 31 Detector 50 Compressor assembly 52

Rotating shaft

100, 200, 300, 400, 500

Compressor wheel

102, 302

Back plate

102a, 302a (on the back plate) Side surfaces 104, 204, 304, 404, 504

Boss

104a, 204a, 404a, 504a Tip 104b (Boss tip)

Side

105, 205, 305, 405, 505 Balance cut 106, 108

Compressor blades

110, 210, 310, 410, 510

Sensor detection surfaces

110a,

510a Hole

110b,

510b Bottom

210a, 310a,

410a Notch

210b, 310b, 410b Slope 505a Cut surface A5 Rotation axis L1 Irradiation light L2 Reflected light

Claims

A compressor wheel provided in the compressor assembly,
A boss portion attached to the rotating shaft;
A back plate portion provided on the opposite side to the tip portion on one end side of the boss portion and extending in a direction perpendicular to the rotating shaft;
A sensor detection surface that is provided to be inclined with respect to a side surface of the tip portion of the boss portion or a side surface of the back plate portion and that can be detected by an optical sensor that detects reflected light with respect to irradiation light. Compressor wheel.
A balance cut portion for cutting a part of the side surface is provided at the tip portion of the boss portion,
The said sensor detection surface is provided in the said backplate part side from the area | region in which the said balance cut part is provided, and is provided in the said front-end | tip part side from the back surface of the said backplate part. Compressor wheel.
3. The compressor wheel according to claim 2, wherein the sensor detection surface is a bottom surface of a hole portion formed in the side surface of the boss portion in an inclined direction with respect to the side surface.
The distal end portion includes a first distal end portion provided with the balance cut portion, and a second distal end portion provided on a proximal end side of the first distal end portion and having a larger outer diameter than the first distal end portion,
3. The compressor wheel according to claim 2, wherein the sensor detection surface is a slope of a notch formed on the top side of the side surface of the second tip surface in an inclined direction with respect to the side surface.
3. The compressor wheel according to claim 2, wherein the sensor detection surface is a slope of a notch formed on the top side of the side surface of the back plate portion in an inclined direction with respect to the side surface.
The side surface of the back plate portion is provided with a balance cut portion for cutting a part of the side surface,
The compressor wheel according to claim 5, wherein the sensor detection surface is provided on a top side of a side surface of the side surface of the back plate portion excluding a portion where the balance cut portion is provided.
3. The compressor wheel according to claim 2, wherein the sensor detection surface is an inclined surface of a notch portion formed on the side surface of the boss portion in an inclination direction with respect to the side surface.
A balance cut portion for cutting a part of the side surface is provided at the tip portion of the boss portion,
The sensor detection surface is provided in a region where the balance cut portion is provided, and is a bottom surface of a hole formed in an inclined direction with respect to the cut surface of the balance cut portion, and the bottom surface is the balance cut portion. The compressor wheel according to claim 1, wherein the compressor wheel is located on the side of the rotation axis with respect to the maximum cut range.
An unbalance detection device for a compressor assembly provided with the compressor wheel according to any one of claims 1 to 8,
A rotating unit for rotating the compressor wheel;
An unbalance detection device for a compressor assembly, comprising: a detection unit provided with an optical sensor for detecting a sensor detection surface provided in the compressor wheel.
10. The imbalance detection device for a compressor assembly according to claim 9, wherein the rotating unit is an air supply device that supplies air toward a compressor blade provided in the compressor wheel.
11. The compressor assembly imbalance detection device according to claim 10, wherein the air supply device supplies the air from the downstream side to the upstream side of the compressor wheel.
11. The compressor assembly imbalance detection device according to claim 10, wherein the air supply device supplies the air from an upstream side to a downstream side of the compressor wheel.
10. The compressor assembly unbalance detection apparatus according to claim 9, wherein the rotating unit is a motor that rotationally drives a rotating shaft provided in the compressor assembly.
10. The compressor assembly imbalance detection device according to claim 9, wherein a portion of the compressor assembly that faces the end opposite to the end on which the compressor wheel is provided is an opening.